<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var even=0
        var odd=0
        for (var i = 1;i<=100 ;i++){
            if(i % 2 == 0){
                even +=i
            }else{
                odd += i
            }
        }
        document.write("偶数和为" + even +"<br/>")
        document.write("奇数和为" +odd)
    </script>
</body>
</html>